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What is the cause of "pre" echo?
What is the cause of "pre" echo?
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Old 16th August 2006, 03:27 AM   #1
lgreen is offline lgreen  United States
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Default What is the cause of "pre" echo?

Listening to some CDs on my high resolving system tonight..... On many of them I can hear a "pre" echo....not sure this is the correct term but... (also hope this is the right forum...)

I can hear what sounds like an echo of the beginning of the song before it actually starts....or if there is a quiet part I hear the echo of when it kicks in before it actually starts. This is detectable usually only when there is a quiet part...you hear a faint echo of the next passage before it actually starts, and when it starts the echos of the rest I guess are drowned out.

What's the cause of this? I think I saw something before somewhere that it could be the analog tape masters leaking the signal through to the heads before the rotation got the tape there (1 layer/rotation picked up early?).

Anyone hear this before?
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Old 16th August 2006, 03:35 AM   #2
rpapps is offline rpapps  Antarctica
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Hi Lgreen
The phenomenon is called print through.
There's an explanation here:


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Old 23rd August 2006, 07:03 PM   #3
peace brainerd is offline peace brainerd
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Thanks for the question lgreen - and thanks rpapps for the answer.
I've always wondered about that same thing. Too idly, evidently, to have ever tried to find out about it.
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Old 26th August 2006, 08:10 AM   #4
Pano is offline Pano  United States
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What is the cause of "pre" echo?
Good old print through. You don't hear it as much as you used to.

Print through is why we were taught to store tapes "tail out." That way the echo comes after the main sound. Doesn't sound as bad, if you can even hear it.
As described in the AES article.

Listen with good headphones, you'll hear it pretty often. If you hear it on a DDD CD, you gotta wonder.
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Old 31st August 2006, 12:08 AM   #5
EC8010 is offline EC8010  United Kingdom
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Originally posted by panomaniac
Print through is why we were taught to store tapes "tail out." That way the echo comes after the main sound. Doesn't sound as bad, if you can even hear it.
Well, well, well. You learn something new every day. Nobody mentioned why it made sense to store tapes "tail out".
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